Business Focus Pre-Intermediate Tea
Grant, David; McLarty, Robert

Increase your wordpower
Woxbrandt / Kunze

The Work Revolution
Issues 25

Language Reference for Business Enh
Brieger/Comfort

Bürowörterbuch
Langenscheidt

English in Mind 2 Student's Book
Puchta, Herbert / Stranks, Jeff

The American Heritage Dictionary

English Vocabulary in Use
McCarthy, Michael u.a.

English Grammar in Use Supplementar
Hashemi, Lousie

English Tenses
Schomaekers, Hiltrud